Java example source code file (EdgeNoOpCrash.java)

This example Java source code file (EdgeNoOpCrash.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt, convolveop, edgenoopcrash, image, imagingopexception, kernel, point, util, writableraster

The EdgeNoOpCrash.java Java example source code

/*
 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug     6726779
 * @summary Test verifies that ConvolveOp with the EDGE_NO_OP edge condition
 *          does not cause JVM crash if size of source raster elements is
 *          greather than size of the destination raster element.
 *
 * @run     main EdgeNoOpCrash
 */
import java.awt.Point;
import java.awt.image.ConvolveOp;
import java.awt.image.DataBuffer;
import java.awt.image.ImagingOpException;
import java.awt.image.Kernel;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.util.Arrays;

public class EdgeNoOpCrash {
    private static final int w = 3000;
    private static final int h = 200;

    public static void main(String[] args) {
        crashTest();
    }

    private static void crashTest() {
        Raster src = createSrcRaster();
        WritableRaster dst = createDstRaster();
        ConvolveOp op = createConvolveOp(ConvolveOp.EDGE_NO_OP);
        try {
            op.filter(src, dst);
        } catch (ImagingOpException e) {
            /*
             * The test pair of source and destination rasters
             * may cause failure of the medialib convolution routine,
             * so this exception is expected.
             *
             * The JVM crash is the only manifestation of this
             * test failure.
             */
        }
        System.out.println("Test PASSED.");
    }

    private static Raster createSrcRaster() {
        WritableRaster r = Raster.createInterleavedRaster(DataBuffer.TYPE_USHORT,
                w, h, 4, new Point(0, 0));

        return r;
    }

    private static WritableRaster createDstRaster() {
        WritableRaster r = Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE,
                w, h, 4, new Point(0, 0));

        return r;
    }

    private static ConvolveOp createConvolveOp(int edgeHint) {
        final int kw = 3;
        final int kh = 3;
        float[] kdata = new float[kw * kh];
        float v = 1f / kdata.length;
        Arrays.fill(kdata, v);

        Kernel k = new Kernel(kw, kh, kdata);
        ConvolveOp op = new ConvolveOp(k, edgeHint, null);

        return op;
    }
}